Homework Help Thread

[And1sports]

Originally Posted by GuruSharky

Well I didnt get any homework tonight for trig... *scratches noggin*

SHow it up here then, and let who ever wanna figure it out do so.

[GuruSharky]

I need someone to explain to me how to calculate linear velocity.

For example teach me how to solve:

What is the linear velocity (in ft/sec) of an 8-in blade rotating 72 rev/min?

[GuruSharky]

Eck I gave the problem a shot, tell me what I did wrong if I messed up.


My Work Note: whereever I say 3.14 I am referring to Pi

72 rev/min x ((2(3.14)(4))/1) x (1/60)

My Answer

30.2 ft/sec

[GuruSharky]

Hey there homework help thread! Long time no see!

Anyway I got some questions for all you smart folks.

Subject: Trig

I can't figure out how to do any of these...

Find all real numbers in the interval [0,2π] that satisfy each equation. Round approximate answers to the nearest tenth.

1) sin(-x) = sin(x)

2) 3sin(squared)x = sin (x)

3) 5sin(squared)x - 2sin(x) = cos(squared)x

4) tan(squared)θ - 2tanθ - 1 = 0

answers are probably in set notation {x|x= } and I'm pretty sure each one has 2 to 4 solutions... I need coaching.

[cheychey33221]

im running a bit behind on homework so i will probably be posting in here a bit. so hmmm lets see whats a problem i need help on.... line AC and BD are diameters of circle E. find the measures of the given arc if arc ACD is 316.
arc AD
arc BC
arc BCA
arc DCB
for some reason i just don't understand circles. :/

[Bombz]

Originally Posted by cheychey33221

im running a bit behind on homework so i will probably be posting in here a bit. so hmmm lets see whats a problem i need help on.... line AC and BD are diameters of circle E. find the measures of the given arc if arc ACD is 316. arc AD arc BC arc BCA arc DCB for some reason i just don't understand circles. :/

We know that the circumference of a circle is:

C (circumference) = pi x d(diameter)

If we take a section of the circumference, we'll call it a sector (s).

A circles arc length or sector (s) can be found by using the angle (theta) of the sector.

To correlate pi and theta; pi is a full revolution or 360 degrees, theta is whatever degrees you want. In this sense, I'm not provided with an angle.



A formula for arc length is s=r(theta)

You would simply need to substitue for the values.

Unfortunately, for your problem I would need another variable to continue. Is there a measure for any measure for angles, or length of diameters?

EDIT: If you have a picture, that could help.

[Zerachial]

Well, in addition to Marthy, I can also help with Art.

[TehJeff]

Anyone?? :O
If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y,
then x = ?

[Bombz]

Originally Posted by TehJeff

Anyone?? :O If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y, then x = ?

The sum of infinte 0.5x + 0.5?

That looks like a mess to me. Take a picture of the problem and put it in as a image, that might help a little for me.

[TehJeff]

Originally Posted by Bombz

The sum of infinte 0.5x + 0.5? That looks like a mess to me. Take a picture of the problem and put it in as a image, that might help a little for me.

Hahaha I was joking!
X=1

Not the point though it was a joke. :}